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B18C1 Y80 Transmission Rebuild - Tech Knowledge

Rebuild Your Transmission For Pennies On The Dollar, With Better Performance And Greater Longevity

Text By Luke Munnell, Photography by Luke Munnell
Transmission Rebuild Tech Gear Shot
  • B18c1 Y80 Transmission Rebuild Steve Vasquez
    23 Re-assembly is basically the reverse of disassembly. Laying your parts out in an orderly fashion and referring to the FSM are invaluable at this stage. Unless, that is, you're our installer, Synchrotech lead tech Steve Vasquez. With over 700 re-builds under his belt, he could do this in his sleep, blindfolded, with one hand tied behind his back. Using all his faculties, a full rebuild takes him about an hour.
    B18c1 Y80 Transmission Rebuild Steve Vasquez
    23 Re-assembly is basically the reverse of disassembly. Laying your parts out in an order
  • B18c1 Y80 Transmission Rebuild Lubing
    24 Genuine Honda manual transmission oil is what Synchrotech recommends using with either the OEM or carbon synchros, and it's important to lube bearings, gears, synchros, and sleeves with a bit of it upon re-assembly.
    B18c1 Y80 Transmission Rebuild Lubing
    24 Genuine Honda manual transmission oil is what Synchrotech recommends using with either
  • B18c1 Y80 Transmission Rebuild Lubing
    24, cont.
  • B18c1 Y80 Transmission Rebuild Lubing
    24, cont.
  • B18c1 Y80 Transmission Rebuild Gear Selection Check
    25 Once main- and countershaft assemblies are back together, check the action of gear selection (pictured from top to bottom is a downshift from Second to First), to verify that nothing funky is going on, signifying improper installation.
    B18c1 Y80 Transmission Rebuild Gear Selection Check
    25 Once main- and countershaft assemblies are back together, check the action of gear sel
  • B18c1 Y80 Transmission Rebuild Gear Selection Check
    25, cont.
  • B18c1 Y80 Transmission Rebuild Transmission Assembly Lube
    26 A little transmission assembly lube or oil on the oil seals and bearings does wonders to get them in their place.
    B18c1 Y80 Transmission Rebuild Transmission Assembly Lube
    26 A little transmission assembly lube or oil on the oil seals and bearings does wonders
  • B18c1 Y80 Transmission Rebuild Lubing
    26, cont.
  • B18c1 Y80 Transmission Rebuild Differential And Final Drive Assembly
    27 After replacing the differential/final drive assembly, the needle plate set, magnet, etc., and assembling each shaft, join the gears with their forks on the table, lift them together, and replace into the clutch housing just like you pulled them out.
    B18c1 Y80 Transmission Rebuild Differential And Final Drive Assembly
    27 After replacing the differential/final drive assembly, the needle plate set, magnet, e
  • B18c1 Y80 Transmission Rebuild Installed Differential And Final Drive
    27, cont.
  • B18c1 Y80 Transmission Rebuild Reinstall Transmission
    28 Re-install the rest of the clutch housing innards removed in Step 7, and make sure to coat the gears, selectors and forks with transmission assembly lube if you're not planning to install the transmission and drive right away. If you are, a good coating of transmission oil will suffice.
    B18c1 Y80 Transmission Rebuild Reinstall Transmission
    28 Re-install the rest of the clutch housing innards removed in Step 7, and make sure to
  • B18c1 Y80 Transmission Rebuild Hondabond
    29 Hondabond is so good, it's been suggested to us by Toyota techs. Apply a liberal coating to the clutch housing's mating surface and re-install the transmission housing. Remember to compress the snap-ring when you do, and make sure the ring brake stopper's tab (underneath the mainshaft's largest bearing) is in the correct position to slide into its spot in the transmission housing.
    B18c1 Y80 Transmission Rebuild Hondabond
    29 Hondabond is so good, it's been suggested to us by Toyota techs. Apply a liberal coati
  • B18c1 Y80 Transmission Rebuild Applying Hondabond
    29, cont.
  • B18c1 Y80 Transmission Rebuild Snap Ring Install
    29, cont.
  • B18c1 Y80 Transmission Rebuild Rebuilt Transmission
    30 Re-install the components you took off in the first few steps, affix your Synchrotech sticker and you're done. Re-install the transmission, fill with Honda manual transmission oil, and enjoy all the buttery smooth shifting and high-rpm synchronization you can throw at it (after a short break-in period, of course)-the difference really is night and day. Make sure to change transmission oil after your first drive, to remove any residual gunk, assembly lube or initial shedding.
    B18c1 Y80 Transmission Rebuild Rebuilt Transmission
    30 Re-install the components you took off in the first few steps, affix your Synchrotech
HOTBOX
Synchrotech Transmissions
n/a
AK
905-592-5900
http://synchrotech-transmissions
.com
By Luke Munnell
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